Synchronization Signal Block Beam Sweeping for 5G Coverage
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Solution Overview
Problem
In high-frequency band transmissions, such as those in 5G and New Radio networks, antenna arrays have narrow radiation beams that only point in specific directions, making it difficult for base stations to cover multiple user equipment (UEs) unless they are in close proximity, necessitating a sophisticated beam management mechanism to ensure efficient communication.
Innovation Solution
The method involves transmitting synchronization signal blocks that include a primary synchronization signal, a secondary synchronization signal, and a reference signal, allowing user equipment to detect and manage transmission beams by receiving and processing these signals, enabling the network apparatus to change beam directions and perform beam sweeping to cover a wider area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If antenna arrays are used in high-frequency band transmission, then data rate capability is improved, but beam coverage area is reduced
Solution Approach 1:
The patent applies beam sweeping mechanism where the base station dynamically changes beam directions over time to cover multiple UEs. The beam management procedure allows the transmission beam to rotate and sweep across different spatial directions, transforming the static narrow beam into a dynamic coverage solution that maintains high data rates while expanding effective coverage area.
Solution Approach 2:
The synchronization signal blocks are transmitted periodically in different beam directions as part of the beam sweeping procedure. This periodic transmission allows the system to cycle through multiple beam directions, ensuring that UEs in different locations can receive signals at appropriate intervals, thus resolving the coverage limitation of narrow beams.
2Area of stationary object
If beam direction is changed to cover multiple UEs, then coverage area is improved, but transmission stability is worsened
Solution Approach 1:
The patent implements preliminary beam management procedures where the base station performs beam sweeping and synchronization signal transmission before actual data communication. This preliminary action establishes stable beam pair links between the base station and UEs, ensuring that subsequent data transmission occurs through pre-validated stable beams, thus maintaining transmission stability while achieving wide coverage.
Solution Approach 2:
The beam management procedure incorporates feedback mechanisms where UEs report beam quality measurements to the base station. This feedback allows the base station to identify and select the most stable beam directions for each UE, adjusting beam configurations based on actual channel conditions, thereby maintaining transmission stability across multiple UEs with different spatial locations.
3Productivity
If synchronization signal blocks are transmitted frequently for beam management, then beam management efficiency is improved, but signal transmission time is increased
Solution Approach 1:
The patent merges multiple functions into the synchronization signal block transmission. The same synchronization signal blocks used for initial UE access and time/frequency synchronization are also utilized for beam management purposes. This combining of functions allows the system to achieve efficient beam management without requiring separate dedicated beam management signals, thus avoiding additional transmission time overhead.
Data Source
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AI summary
Various solutions for handling synchronization signal block with respect to user equipment (UE) and network apparatus in mobile communications are described. A UE may receive a synchronization signal block (SS block) from a network apparatus. The UE may detect a transmission beam of the network apparatus according to the SS block. The SS block may comprise a first synchronization signal, a second synchronization signal and a reference signal for detecting the transmission beam. The first synchronization signal may be a primary synchronization signal (PSS), the second synchronization signal may be a secondary synchronization signal (SSS), and the reference signal may be a demodulation reference signal (DMRS). The SS block may further comprise a broadcast channel and wherein the DMRS is used for demodulation of the broadcast channel.